8. Botryococcus braunii
According to the DOE, “Botryococcus braunii is a colony-forming green microalga, less than 10 micrometers in size, that synthesizes long-chain liquid hydrocarbon compounds and sequesters them in the extracellular matrix of the colony to afford buoyancy. A type of B. braunii produces a family of compounds termed botryococcenes, which hold promise as an alternative energy source. Botryococcenes have already been converted to fuel suitable for internal combustion engines.
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